*{
    margin: 0;
    padding: 0;
}

/* 背景图 */
body{
    background: url('./bg.jpg') no-repeat center center fixed;
    background-size: cover;
    padding-top: 5px;
}

/* 头部 */
header{ text-align: center;}

header h1{
    margin: 10px 0;
    color: white;
}

/* 文章信息 */
.details span{ color: #888;}
.details a{
    color: blue;
    text-decoration: none;
}
.details button{
    font-size: 12px;
    padding: 2px 10px;
}

hr{
    height: 2px;
    margin: 10px 0;
    background-color: white;
}

/* 文章内容 */
article{ color: white;}

article h3{
    margin: 15px 0;
}

article p{
    text-indent: 2em;
    text-align: justify;
    margin: 15px 0;
}

article p>span{
    text-decoration: underline wavy red;
}

/* 尾部 */
footer{
    font-size: small;
    color: #888;
}